Equilateral triangle

Find the area of an equilateral triangle with a side of 15 cm.

Correct answer:

S =  97.4279 cm2

Step-by-step explanation:

a=15 cm  a2 = (a/2)2 + h2  S = 2a h  S=43 a2=43 152=97.4279 cm2

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Tips for related online calculators
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